S
M
T
W
T
F
S
30
83°
49°
31
70°
51°
1
73°
58°
2
76°
57°
3
69°
58°
4
77°
52°
5
81°
50°
6
77°
51°
7
91°
48°
8
97°
51°
9
103°
59°
10
98°
64°
11
83°
58°
12
79°
52°
13
76°
57°
14
87°
50°
15
84°
50°
16
68°
50°
17
76°
60°
18
82°
53°
19
87°
50°
20
73°
55°
21
78°
56°
22
79°
55°
23
92°
50°
24
92°
51°
25
78°
62°
26
80°
48°
27
76°
55°
28
83°
45°
29
95°
46°
30
95°
50°
1
94°
46°
2
93°
51°
3
102°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Novato
Novato's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Novato. See also: October | November | December.